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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Flies (Diptera) » "Orthorrhapha" (Brachycera excluding Aschiza and Schizophora) » Asiloidea » Robber Flies (Asilidae) » Asilinae » Efferia
Photo#143121
Horse Fly? - Efferia
Copyright © 2007 David Brady

Horse Fly? - Efferia
Moab, Grand County, Utah, USA
September 2, 2007
Size: 20mm
These things were the bane of my childhood! I must have been bitten hundreds of times as a kid, hiking up and down Mill Creek in Moab. Is this a proper horse fly, or a similar but different species?
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Contributed by David Brady on 4 September, 2007 - 11:25pm
Last updated 20 September, 2007 - 9:49pm

Efferia
Species in the big group out west. Likely in the Nerax group. These don't bite human trail hikers.
… Herschel Raney, 5 September, 2007 - 11:16am login or register to post comments

Fly
This appears to be a Robberfly (female, I think). No idea of species or even genus though, sorry.
Steve
… Steven Price, 5 September, 2007 - 4:24am login or register to post comments

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